Chosen Solution

Old mac ran fine, in 10.7, needed to upgrade last summer to something above 10.7 to keep syncing iPhone pics. Now the thing runs super slow in El Capitan 10.11. Is the hardware just too old for the new OS? Or do I need to search for the problem? Thanks!

The standard RAM back in 2007 was 1GB. If you are still running with that, it would be super slow. Standard RAM: 1 GB Maximum RAM: 6 GB* Details: 1 GB of RAM is installed as a single SO-DIMM module. *Apple officially supports 4 GB of RAM, but third-parties have been able to upgrade the system to 6 GB of RAM using one 2 GB and one 4 GB memory module. * RAM Type: PC2-5300 DDR2 Min. RAM Speed: 667 MHz